TYPE(1P) POSIX Programmer's Manual TYPE(1P)
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond-
ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
type - write a description of command type
The type utility shall indicate how each argument would be interpreted if used as a command name.
The following operand shall be supported:
name A name to be interpreted.
The following environment variables shall affect the execution of type:
LANG Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume of
IEEE Std 1003.1-2001, Section 8.2, Internationalization Variables for the precedence of internationalization variables used to
determine the values of locale categories.)
LC_ALL If set to a non-empty string value, override the values of all the other internationalization variables.
Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to
multi-byte characters in arguments).
Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error.
Determine the location of message catalogs for the processing of LC_MESSAGES .
PATH Determine the location of name, as described in the Base Definitions volume of IEEE Std 1003.1-2001, Chapter 8, Environment Vari-
The standard output of type contains information about each operand in an unspecified format. The information provided typically identifies
the operand as a shell built-in, function, alias, or keyword, and where applicable, may display the operand's pathname.
The standard error shall be used only for diagnostic messages.
The following exit values shall be returned:
0 Successful completion.
>0 An error occurred.
CONSEQUENCES OF ERRORS
The following sections are informative.
Since type must be aware of the contents of the current shell execution environment (such as the lists of commands, functions, and built-
ins processed by hash), it is always provided as a shell regular built-in. If it is called in a separate utility execution environment,
such as one of the following:
nohup type writer
find . -type f | xargs type
it might not produce accurate results.
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
/The Open Group 2003 TYPE(1P)